21110211102111 has 32 divisors (see below), whose sum is σ = 29854327996416. Its totient is φ = 13245114816000.

The previous prime is 21110211102077. The next prime is 21110211102137. The reversal of 21110211102111 is 11120111201112.

It is not a de Polignac number, because 21110211102111 - 2¹⁴ = 21110211085727 is a prime.

21110211102111 is a modest number, since divided by 211102111 gives 2111 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110211102311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5810871 + ... + 8717031.

It is an arithmetic number, because the mean of its divisors is an integer number (932947749888).

Almost surely, 2^{21110211102111} is an apocalyptic number.

21110211102111 is a deficient number, since it is larger than the sum of its proper divisors (8744116894305).

21110211102111 is a wasteful number, since it uses less digits than its factorization.

21110211102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908343.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21110211102111 its reverse (11120111201112), we get a palindrome (32230322303223).

Subtracting from 21110211102111 its reverse (11120111201112), we obtain a palindrome (9990099900999).

The spelling of 21110211102111 in words is "twenty-one trillion, one hundred ten billion, two hundred eleven million, one hundred two thousand, one hundred eleven".